I decided to give this plugin a try and found an odd feature for its HTML minifier. When you enable HTML minification and check the source of your page you will notice a newline after every tag...huh? Exactly! So this plugin adds more characters than it saves. Its really quite baffling because when you check the php file that is doing this you see the author intended to do this..its not a bug. So i have to assume it was a mental relapse or something.
By him removing the following from his php code it will improve his plugin. Until then i have removed it on my side and dont intend to update it again:
// use newlines before 1st attribute in open tags (to limit line lengths)
$this->_html = preg_replace('/(<[a-z\\-]+)\\s+([^>]+>)/i', "$1\n$2", $this->_html);